today we learned the identity of another fatality, 29-year-old krystle campbell of medford, mass. she was with her best friend watching that friend's boyfriend cross the finish line when she was killed in the blast. talk about going from joy well, to heaven, maybe. we also got new video from a marathon runner named jennifer treacy approaching the finish line when the first bomb went off. we're also learning new details about the bombs, themselves. we now know they contained explosives and shrapnel packed inside a pressure cooker, regular kitchen pressure cooker and they were placed inside backpacks. we also now know the bombs were set off by an electric timer. the "boston globe" reported a circuit breaker was used to trigger the dual explosions. president obama did something today he didn't do yesterday. he called it an act of terrorism. >> this was a heinous and cowardly act, and given what we now know about what took place, the fbi is investigating it as an act of terrorism. any time bombs are used to target innocent civilians, it is an act of terror. >> well, there's still so m